Xilinx FIFO和ILA学习
`timescale 1ns / 1ps
//-------------------------------------------------------
//Filename ﹕ FIFO_TOP.v
//Author ﹕ ChanRa1n
//Description ﹕ Control FIFO IP
//Calledby ﹕ Topmodule
//RevisionHistory﹕ 2022-03-23 15:58:19
//Revision ﹕ 1.0
//Email ﹕ chenyu@myfpga.cn
//Website ﹕ https://www.myfpga.cn
//Copyright(c) 2018-2022, MYFPGA.CN, All right reserved
//-------------------------------------------------------
module FIFO_TOP (
input Sys_clk_in,
input Sys_rst_n
);
//Signal
reg [7:0] din;
reg [0:0] wr_en;
reg [0:0] rd_en;
wire [7:0] dout;
wire [0:0] full;
wire [0:0] empty;
wire [25:0] probe0;
//Private
reg [2:0] State_now;
reg [2:0] State_next;
reg [7:0] Trans_counter;//实际使用255
wire Flag_write_read;
wire Flag_read_idle;
localparam STATE_IDLE =3'b001;
localparam STATE_WRITE=3'b010;
localparam STATE_READ =3'b100;
assign Flag_write_read=State_now==STATE_WRITE && Trans_counter==255;
assign Flag_read_idle=State_now==STATE_READ && Trans_counter==255;
always @(posedge Sys_clk_in or negedge Sys_rst_n) begin
if(~Sys_rst_n)begin
State_now<=STATE_IDLE;
end
else begin
State_now<=State_next;
end
end
always @(posedge Sys_clk_in or negedge Sys_rst_n) begin
if(~Sys_rst_n)begin
State_next<=STATE_IDLE;
end
else begin
case(State_now)
STATE_IDLE:State_next<=STATE_WRITE;
STATE_WRITE:State_next<=Flag_write_read?STATE_READ:State_next;
STATE_READ:State_next<=Flag_read_idle?STATE_IDLE:State_next;
default:State_next<=State_next;
endcase
end
end
always @(posedge Sys_clk_in or negedge Sys_rst_n) begin
if(~Sys_rst_n)begin
Trans_counter<=0;
end
else begin
case(State_now)
STATE_IDLE:Trans_counter<=0;
STATE_WRITE:Trans_counter<=Trans_counter+1;
STATE_READ:Trans_counter<=Trans_counter+1;
default:Trans_counter<=Trans_counter;
endcase
end
end
always @(posedge Sys_clk_in or negedge Sys_rst_n) begin
if(~Sys_rst_n)begin
din<=0;
wr_en<=0;
rd_en<=0;
end
else begin
case(State_now)
STATE_IDLE:begin din<=0;wr_en<=0;rd_en<=0; end
STATE_WRITE:begin din<=Trans_counter;wr_en<=1;rd_en<=0; end
STATE_READ:begin din<=0;wr_en<=0;rd_en<=1; end
default:begin din<=0;wr_en<=0;rd_en<=0; end
endcase
end
end
fifo_generator_0 fifo_generator_0_u(
.clk (Sys_clk_in ),
.srst (~Sys_rst_n ),
.din (din ),
.wr_en (wr_en),
.rd_en (rd_en),
.dout (dout ),
.full (full ),
.empty (empty)
);
assign probe0 [0:0] = wr_en;
assign probe0 [1:1] = rd_en;
assign probe0 [2:2] = full;
assign probe0 [3:3] = empty;
assign probe0 [11:4] = din;
assign probe0 [19:12] = dout;
assign probe0 [22:20] = State_now;
assign probe0 [25:23] = State_next;
ila_0 inst_ila_0 (
.clk (Sys_clk_in),
.probe0 (probe0)
);
endmodule
实验效果：
相关问题：
异步FIFO的深度计算问题
